ENGINEERING TECHNOLOGY

Researchers proposed a new lithium anode frame architecture


Recently, researchers from the Materials Research Center of the Institute of Modern Physics, Chinese Academy of Sciences and collaborators from Beihang University proposed a new three-dimensional lithium anode frame architecture using nuclear trail technology. The results were published in Advanced Energy Materials.

Exploring the ideal frame structure of high-performance battery anode materials is a cutting-edge scientific problem in the world. Lithium metal anode is considered to be an ideal anode material for the next generation of lithium batteries, but problems such as dendrite generation during cycling have hindered its commercial application. Therefore, it is of great significance to find a lithium anode frame architecture with high energy density, high power density and high cycle stability for the development of high-performance lithium-ion batteries.

Based on the Lanzhou Heavy Ion Research Facility (HIRFL), researchers used nuclear trail technology to construct a new three-dimensional porous composite frame structure. The structure consists of a three-dimensional nano-copper skeleton and uniformly distributed lithium-loving sites, which are compounded with lithium metal as the anode of lithium-ion batteries. The composite frame structure exhibits a long cycle life and high rate capability of more than 2000 hours. Even under high area capacity and high current density, the composite anode exhibits stable cycling performance after 600 hours of operation.

Compared with other frame structures of the same material, the three-dimensional porous composite frame structure significantly improves the electrochemical performance of lithium-ion batteries. Further studies show that the good mechanical strength, high porosity and low pore tortuosity of the composite frame structure are the main factors for the improvement of battery performance.

This work introduces nuclear trail technology into the field of electrode materials, and proposes a new metal lithium anode frame architecture, which is of great significance for exploring high-performance anode materials, which is conducive to studying the specific form of the ideal anode frame structure, and triggers more discussions and thoughts among researchers on the lithium anode frame architecture, which will help solve the key problems of lithium metal anode and the development of energy storage.

This work was supported by the National Natural Science Foundation of China Joint Key Project and the Key Research Program of Frontier Science of the Chinese Academy of Sciences. (Source: Institute of Modern Physics, Chinese Academy of Sciences)

Related paper information:https://doi.org/10.1002/aenm.202300129

Figure: Schematic diagram of the structure construction of lithium anode frame

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